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Production method for lightweight ceramic material by extrusion molding

A lightweight ceramic and extrusion molding technology, which is applied in the production field of extruded lightweight ceramic materials, can solve the problems of easy cracking of the green body, poor plasticity of the mud, and difficulty in molding, and achieves low raw material components and utilization. High rate, low pollution effect

Inactive Publication Date: 2014-02-12
佛山红狮陶瓷有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention solves the problem of poor plasticity of the clay caused by the raw material containing a large amount of vitrified brick polishing waste in the process of extrusion molding to produce light-weight ceramic materials by adding an anti-cracking agent with a weight ratio of 0.1% to 2% to the raw material. , Difficult to shape and easy to crack the green body

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Mix vitrified brick polishing sludge with a weight ratio of 85% and 15% clay, plus 2% anti-cracking agent, and mix evenly with water. The mud granules are made by a screen granulator, and the mud granules are extruded by a vacuum extruder and cut into adobes of 400×200×40mm. The moisture content of the mud is 22%, and the vacuum degree of the vacuum extruder is -0.8~-1MPa. After the bricks are placed on the drying car, they are naturally dried for one day, then put into the drying kiln for 20 hours, and then loaded on the kiln car. pink. After drying in an intensive drying kiln for 10-18 hours, it is fired in a tunnel kiln, and the moisture content of the kiln body is less than 1%. The firing temperature is 1200°C, and the firing cycle is 20 hours. After firing, the bulk density of the product is 600Kg / m3, the linear expansion rate is 40%, the flexural strength is 3.0 MPa, the compressive strength is 1.69 MPa, and the water absorption rate is 5%.

Embodiment 2

[0026] Mix vitrified brick polishing sludge with a weight ratio of 60% and 40% clay, plus 0.3% anti-cracking agent, and mix evenly with water. The mud granules are made by a screen granulator, and the mud granules are extruded by a vacuum extruder and cut into adobes of 400×200×40mm. The moisture content of the mud is 18%, and the vacuum degree of the vacuum extruder is -0.8~-1MPa. After the bricks are placed on the drying car, they are naturally dried for one day, then put into the drying kiln for 20 hours, and then loaded on the kiln car. pink. After drying in an intensive drying kiln for 10-18 hours, it is fired in a tunnel kiln, and the moisture content of the kiln body is less than 1%. The firing temperature is 1250°C, and the firing cycle is 22 hours. The bulk density of the fired product is 900kg / m 3 , the linear expansion rate is 20%, the thermal conductivity is 0.19 W / m.k, the flexural strength is 5.42 MPa, the compressive strength is 2.14 MPa, and the water absor...

Embodiment 3

[0028] Mix vitrified brick polishing sludge with a weight ratio of 71% and 29% clay, plus 1% anti-cracking agent, and mix evenly with water. The mud granules are made by a screen granulator, and the mud granules are extruded by a vacuum extruder and cut into adobes of 400×200×40mm. The moisture content of the mud is 20%, and the vacuum degree of the vacuum extruder is -0.8~-1MPa. After the bricks are placed on the drying car, they are naturally dried for one day, then put into the drying kiln for 20 hours, and then loaded on the kiln car. pink. After drying in an intensive drying kiln for 10-18 hours, it is fired in a tunnel kiln, and the moisture content of the kiln body is less than 1%. The firing temperature is 1150°C, and the firing cycle is 22 hours. The bulk density of the fired product is 780kg / m 3 , the linear expansion rate is 30%, the flexural strength is 4.53MPa, the compressive strength is 1.96MPa, and the water absorption rate is 4.5%.

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Abstract

The invention discloses a production method for a lightweight ceramic material by extrusion molding. The problems that the mud is poor in plasticity and not easy to form, a blank body is easy to crack and the like because raw materials contain a large amount of polished vetrified tile scraps in the process of producing the lightweight ceramic material by the extrusion molding are solved by adding 0.1 to 2 weight percent of blank body anti-cracking agent into the raw materials. Therefore, the lightweight ceramic material production method, which has few raw material components, simple preparation process, small using amount of plastic clay, and high utilization rate of the polished vetrified tile scraps is provided. Products have the characteristics of low density, high strength, heat insulation, temperature preservation, sound insulation, fire resistance, water resistance, long service life and the like.

Description

technical field [0001] The present invention relates to a production method of extruded lightweight ceramic materials, in particular to a method of producing lightweight ceramic materials with good performances such as thermal insulation and sound insulation by using vitrified brick polishing mud, and also relates to its specific methods Production Process. Background technique [0002] With the continuous progress of society, people's requirements for environmental protection are getting higher and higher. At present, the production of a large number of vitrified tile polishing waste in the ceramic industry has a great impact on the environment. The degree of treatment and utilization of polished brick waste residue is relatively low, and most of them are landfilled as waste, which not only pollutes the environment, but also wastes resources. Therefore how to effectively utilize it has become a topic that ceramic manufacturers and ceramic workers pay close attention to. B...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/63C04B35/634C04B35/622
Inventor 蔡克勤区新权王晓燕
Owner 佛山红狮陶瓷有限公司